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Subject: Re: [PATCH] Linux-2.5 fix/improve get_pid()
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jamie Lokier <lk@tantalophile.demon.co.uk>
Cc: Linus Torvalds <torvalds@transmeta.com>,
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On Sat, 2002-08-10 at 19:48, Jamie Lokier wrote:
> Linus Torvalds wrote:
> > > Oh dear -- what of programs that assume duplicate inode numbers are hard
> > > links, and therefore assume the same contents will be found in each
> > > duplicate?
> > 
> > Well, anybody who tries to back up /proc with "tar" is in for some 
> > surprises anyway ;)
> 
> I was thinking of an over-intelligent `find'.  But hey, as long as this
> is only for the weird and wonderful /proc :-)

If they hold both handles open and stat them and find the same inode
number then yes its a bug. We have lots of room for inode numbers to
handle 2^30 processes and allow for 2^30 other files

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